Not only is your biology a bit off ... so is your math.
About 140 MILLION babies are born each year globally. If, as you claim, one in 1,000 is born with indeterminate genitalia, as you claim, then that amounts to 140,000 globally. Certainly NOT "tens of millions".
Even if you take that 2% figure of those born with indeterminate secondary sexual characteristics then the total global number each year is under three million globally each year, still well short of your "tens of millions claim".
Anomalies in sexual characteristic is, using your own numbers, exceptionally rare and hardly worth the effort you, and many others, seem to invest in attempting to transform culture to accommodate it.